The dynamic problem of interaction between a 2-level atom and double modes field is analyzed. It dealt with the process of exchange of momentum between the field and the atom.

讨论了双模量子环型微腔中二能级原子与腔场相互作用的动力学问题，分析了量子微腔的双模腔场和原子质心交换动量的过程。

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Finally, spin relaxation of polarized atom due to spin-exchange collisions and spin-destruction collisions is put forward.

最后，提出了因自旋交换碰撞和自旋销毁碰撞引起的极化原子的自旋弛豫。

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